Bed-bottom.



PATENTED JULY 18, 1905.

H. R. HERVEY.

BED BOTTOM.

APPLIOATION rum) OUT. 11, 190-1.

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AA 9 W wvi/Mwooeo PATENTED JULY 18, 1905.

H. R. HBRVEY. BED BOTTOM.

APPLIOATION FILED on. 11. 19M.

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' on. n c. mum w n ma: we 00 n molm IOCRAPHLRs mm-an UNITED STATESPatented July 18, 1905.

PATENT OFFICE.

HARRY R. HERVEY, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO NATHAN P.RATHBUN, OF BROOKLYN, NEW YORK.

BED-BOTTOM.

SPECIFICATION forming part of Letters Patent No 795,223, dated July 18,1905.

Application filed October 11, 1904:. Serial No. 227,984.

To (LZZ whom it may concern:

Be it known that I, HARRY R. HERVEY, a citizen of the United States,residing in New York city, borough of Brooklyn, New York,

have invented certain new and ,useful Improvements in BedBottoms, ofwhich the following is a specification.

My invention has for its object to provide a bed-bottom in which themattress may be .easily supported throughout its extent, so as toprevent sagging, and wherein the mattress will be resiliently supportedand so that the parts will have freedom of movement under the weight ofa person, whereby a comfort able and useful bed-bottom is produced.

The invention comprises the novel details of improvement and thecombinations of parts that will be more fully hereinafter set forth andthen pointed out in the claims.

Reference is to be had to the accompanying drawings, forming parthereof, wherein- Figure 1 is a plan view, partly broken, of a bed-bottomembodying my invention. Fig. 2 is a side View thereof. Fig. 3 is anenlarged detail side view, partly in section, of one corner of the lowerframe and the movable ball-carrier. Fig. 4 is a cross-section on theline 4 4 in Fig. 3. Fig. 5 is a detail plan view of one corner of thelower frame of the bed-bottom. Fig. 6 is an enlarged detail sectionsubstantially on the line 6 6 in Fig. 1 looking in the direction of thearrows. Fig 7. is an end view of the ball-guide. Fig. 8 is a detailperspective view of the ball-guide, bearing, or cup in the ball-carrier;and Fig. 9 is a detail sectional view showing means to kee the carriers10 from rising from the guiding-bars.

Similar numerals of reference indicate corresponding parts in theseveral views.

The bed-bottom illustrated is provided with a rigid lower frame 1 torest within abedframe and with an upper frame 2 to support a mattress,between which frames are interposed semi elliptic springs 3, whichextend along the longitudinal sides of the frames. To the ends of thesprings 3 are pivotally attached ball-carriers 4, provided withantifriction-balls 5 to travel upon the side bars of frame 1. The sidebars of frame 1 on their upper edges are provided with grooves 1 toserve as guiding-ways for the balls 5. In the form shown I make the barsof the lower frame 1 of suitable tubes, which may be connected by elbows6 to form a rigid structure, and the grooves or ways 1 are formed bydepressing the upper walls of the side bars. (See Fig. 4.) Theupperframe 2 Ihave shown consists of side and end bars connectedtogether by cross-slats 7, which may be riveted to the bars 2. Thecross-strips 7 may be made of relatively thin metal and strengthened bybraces 7 which may be made by bending one or more edges of the strips 7at right angles in channel or L form or by attaching astrengthening-strip beneath the cross -strips 7 in well -known manner. Ihave shown certain of the springs 3 as secured to the side bars 2beneath the ends of certain cross-bars 7, whereby the bars 2 and 7 andthe springs may be riveted together in a firm structure. Theball-carriers 4 have sides or lugs 4 and a bottom 4 forming a space toreceive the balls 5, which are located in and project through openings 4in the bottom 4*, and at S is a bearing or cup for the balls securedwithin the carrier 4, as by rivets 9, and resting upon the balls. Asshown in the drawings, the bearing 8 is com posed of a tube having onewall bent at 8' in manner corresponding to the way 1 of tube 1 and isinverted over tube 1, so that the balls ride in the space between thegrooves 1" and 8 (See Fig. 4.) The ends of the springs are shownprovided with an eye or coil located between the sides or lugs 4 of theballcarrier and receiving a bolt or pivot 10, whereby the springs arepivotally connected with the corresponding ball-carriers 4. To keep theupper and lower frames 1 2 in proper relation and permit the frame 2 torise and fall, I secure to the end bars of frame 2 depending rods11,,which pass freely through holes 12 in the lower bars of frame 1,nuts or stops 13 on the rods 11 serving to limit the upward movement offrame 2, and said rods 11 limit lateral play of frame 2 over frame 1.

In Fig. 9 I have shown the carriers 4 as provided with yokes or stops14, which eX tend downwardly and under the side bars of frame 1 and keepthe carriers 4 from rising from said side bars. Bumpers or stops 15 (seeFig. 2) may be provided on the frame 2 for contact with the side bars 1(or on the side bars 1. to resist the bars 2) to limit the downwardmovement of frame 2 to prevent undue strains on the springs 3.

Any suitable number of springs 3, with their carriers 4 at the ends, maybe connected with the top frame 2 on the sides and also at the ends ofthe bed-bottom, if desired, and said springs may be of relatively lighttension and yet sufficiently stiff to resiliently suport a mattress andone or more persons ying thereon. Under the weight of the person on themattress the springs will bend, and by reason of the antifrictionball-bearing connections between the ends of the springs and the bars ofthe lower frame the springs can move freely at their ends upon saidbars. As the frame 2 may be made very rigid and yet be resilientlysupported upon spring 3, the mattress will be kept from sagging whilehaving free vertical movement, producing thereby a very comfortable andresilient mattress.

WVhile my improvements are shown in connection with a bed-bottom, itwill be under stood that they may be used in other relations-as, forinstance, the springs, with their ball-carriers and the frames, may beincorpo rated in a vehicle, the seats being carried by frame 2and insuch case it will be desirable to provide stops or yokes 14 to keep theballcarriers 4 from rising from the side bars as the vehicle runs alongthe ground.

Having now described my invention, what I claim is 1. The combination oflower and upper frames, with semi-elliptic springs interposed betweensaid frames and secured to one of the frames, said springs at their endshaving ball carriers provided with balls resting upon side bars of theopposed frame, said bars having ways receiving said balls, substantiallyas described.

2. The combination of lower and upper frames, with semi-elliptic springsinterposed between said frames and secured to one of the frames, saidsprings at their ends having ball carriers provided with balls restingupon side bars of the opposed frame, said side bars having depressedways receiving said balls, and means interposed between said frames topermit vertical movement of one frame with respect to the other and toprevent lateral displacement of the movable frame with respect to theother frame, substantially as described.

3. The combination of lower and upper frames, with semi-elliptic springssecured to one of said frames, ball-carriers pivotally connected withsaid springs and provided with inverted depressed guides, balls enteringsaid guides and bearing on side bars of the lower frame, said side barshaving depressed ways receiving said balls, substantially as described.

4. The combination of lower and upper frames, the lower frame havingtubular side bars the upper surfaces of which. are bent inwardly formingdepressed ways, semi-elliptic springs secured to the upper frame and eXtending over the side bars of the lower frame, ball-carriers pivotallyconnected with said bearings and provided with. guides facing the waysof the lower frame, balls interposed between said guides and ways, andmeans for keeping the balls in position in the carriers, substantiallyas described.

5. The combination of lower and upper frames, with semi-elliptic springssecured to the upper frame, ball-carriers connected with said springs,said carriers having side members between which the ends of the springsare pivotally attached, said carriers also hav ing bottoms provided withopenings and having guides above said openings, and balls located insaid openings resting upon the side bars of the lower frame, the guidesresting upon said balls, substantially as described.

HARRY R. HERVEY.

Witnesses T. F. BOURNE, M. HOLLINGSIIEAD.

